Tim, thanks for that offer. I'm still thinking about that too. I know pics would help, but I hate going through that exercise even more than I hate working with horn. but at least I can type!
Top Jaw, had not considered that! Dang! And I was imagining a nicely patinaed steel band with contrasting brass tacks. Oh well. I was wondering more along the lines of sparks from static electricity. At least I was thinking, a little...
Looking at it a bit more, I may have the skills, and desire, to reduce ID of one end, and OD of the other to make a snug fit, with tacks or wood pegs and hide glue to secure the two parts.
This was one of those horns that I later saw described in a TOTW catalog as "economy horn, may require more work to finish drilling spout to the main compartment." A relative presented it to me at a modern show. I think he felt guilty when he found out that it was my birthday. I think I remember seeing them for about $14 that day. So not a pretty thing (mostly black now after trimming off the cracks at the base), and not useful without more work. But it does have a bit of sentimental value, I was thrilled to get it that day.
Of course later I learned that it only held about 20 grains of powder under the plug at the spout. After taking out the tacks at the base, I also realized I did not have tools or skills to fix at the time, so it just got put away into a box under the workbench.
Now that I trimmed off the base, and realized how thick it is towards the tip, it really does not hold much.